Combination lock



May 12,1936.

, P. BoLls COMBINATION LOCK V2 Shets-SheeI 1 Filed May 24. 1934 p/e/ZtI/NVETO BY n/2? TORNEY P, BoLls 2,040,120

COMBINATION LOCK Filed May 24, 1934 y2 Sheets-Sheet 2 I/l/I/f//z AT ORNEY INVENTO M/V Maiyv 12, 1936.

MII,

Patented May 12, 1936 UNITED STATES PATENT GFFICE 4 Claims.

This invention relates to combination or permutation locks, and` one object of the invention is to provide such a lock embodying novel and improved features of construction whereby the lock shall be simple to operate and canbe manufactured at low cost. Another object is to provide a novel and improved combination lock including a plurality of coaxial permutation members or discs each of which has a recess to align with the recesses of the other discs when the discs are in a predetermined relation to each other, said recesses to cooperate with a locking member when they are in said predetermined relation to release the locking member which is normally held againstrelease by abutment with the peripheries of the discs when said recesses are out of alignment, the

peripheries ofthe discs being so formed that operation of the lock without knowledge of the combination as by clicking or operating the discs and then manually manipulating the locking member to align the recesses of the discs, shall be impossible; in other words, an important object of the invention is to provide a permutation lock which shall be substantially pick-proof.

Other objects of the invention are to provide a permutation lock including a novel and improved construction and combination of permutation members.- locking member and operating member, whereby the parts shall be simple and inexpensive in constructionand can be easily and inexpensively assembled, and to obtain other 4advantages and results as will be brought out by the following description. 35 Referring to the accompanying drawings in which corresponding and like parts are designated throughout the several views by the same reference characters:

Figure 1 is a top plan view of a safe embodying a permutation lock constructed in accordance with my invention.

Figure 2 is a plan view of the door of the safe lwith the outer wall thereof removed and showing the locking casing in plan view.

Figure 3 is a similar view with the outer wall gofthe lock casing removed.

.. Figure 4 is a detached plan view of the underside of the outer wall of the lock casing and the permutation member mounted thereon.

Figure 5 is a view similar to Figure 4 with a portion of the spacing disc for the permutation member removed. Figure 6 is a view similar to Figure 3 with '55 the -next partition wall of, the lock removed to expose-the permutation disc beneath that shown in Figure 3.

Figures 7 and 8 are detached plan views of the bottom of the partition plate removed from Figure 6.

Figure 9 is a fragmentary view similar to Figure 3 showing the bottom Wall of the lock casing with all of the permutation members and partition walls removed.

Figure 10 is an enlarged transverse sectional view through the lock and safe cover on the line IIJ- I0 of Figure 1.

Figure 11 is an enlarged fragmentary planview of the operating members of the lock with portions broken away to show the connection of the operating members to the permutation members.

Figure 12 is a schematic sectional view showing the connections of the operating members to the respective permutation members.

Figure 13 is an enlarged transverse sectional view on the line I3-I3 of Figure 1, and

Figure 14 is a fragmentary sectional perspective view through one wall and a portion of the cover of the safe.

Specifically describing the embodiment of the invention illustrated in Figures 1 to 14, the reference character A designates the body of the safe which is approximately box-like and has a cover or door B hingedly connected to one wall at C; if desired the safe may be set into the wall of a room with only the door exposed. Preferably the walls and door of the safe are heat insulated as indicated at D. 'Ihe door is shown as comprising inner and outer plates E and F between which are mounted the combination lock mechanism embodying the invention.

This lock mechanism includes two sliding bolts I which are movable in opposite directions and cooperate with keeper lugs 2 on the side walls of the body A. These bolts are simultaneously reciprocated in opposite directions by a pinion 3 meshed with racks 4 on the bolts and mounted on a stubshaft 5 journaled in the plates E and F and projecting through the outer plate with its outer end connected -to a handle 6. One of the bolts has a pin and slot connection 'I with a block 8 pivotally mounted at 9 on the lock casing and having a stud and slot connection I U` with a locking member I IIJ which cooperates with permutation members and is slidable in slots III in the walls of the lock casing.

In the present instance, therev are shown four permutation members II, I2, I3 and I 4, each of which consists of a disc of metal, and said discs are coaxially rotatable in the lock casing. As

more clearly shown in Figure 10 of the drawings the lock casing includes a bottom wall I5 secured to the inner wall F of the door of the safe, an intermediate partition plate I6, and a top plate I1 which are connected together by screws I8. The top plate I 1 has a spacer disc I9 xedly connected to the plate by a ange 20 on the disc which is secured in the plate; the permutation disc I I is rotatably mounted between the plate I1 and the spacer disc I9. Between the spacer disc I9 and the intermediate partition wall I6 is rotatably mounted the permutation disc I2 which has an integral coaxial flange 2l projecting upwardly through the ilange 20 and through the outer wall E of the door of the safe. An operating member 22 in the form of a disc has a key connection 230 with the ange 2l. The permutation disc I3 is disposed between the partition wall I6 and another spacer disc 23 which has a coaxial central flange 24 projecting upwardly through the ilange 2|' while the last permutation disc I4 is disposed between the spacer disc 23 and the bottom wall I5 of the lock casing. This permutation disc III is xedly connected to a pin 25 which projects upwardly through the ange 24 and is connected to a second operating member 26 which is in the form of a disc. It will therefore be seen that the permutation discs I2, I4 are xedly connected respectively to the operating members 22 and 26. The permutation disc I4 has a stud and slot connection with the next adjacent permutation disc I3, which in .the present instance consists of a lug 21 struck up from the disc I4 and passing through an arcuate slot 28 in the disc I3. Similarly, the permutation disc I2 has a stud and slot connection 29 with the disc II. These connections are clearly shown in the schematic diagram of Figure I 2. It will therefore be understood that the discs are arranged in two pairs and discs I4 and I2 can be rotated `directly by the respective operating members 23 and 22 while the discs I3 and' II can be operated by the operating members through the stud and slot connection with the discs I4 and I2, the discs I I and I3 being operated by engagement of the studs with the ends of the arcuate slots. The variousdiscs thus can be selectively operated, and the discs I4- and I2 can be operated separately from or independently of the discs I3 and II.

Each permutation disc has a recess 30 in its periphery which can be aligned withV the recesses in the other ,discs when the discs' are in predetermined relation to each other, and the locking member IIO is movable into all of said recesses simultaneously when the recesses are so aligned. The plate I6 is formed with a notch I I6 to permit the locking member to enter said recesses. Normally when the lock is in lockingl position, the bolts I. are slid outwardly beneathl the lugs 2 as shown in Figure 13 and the locking member I I0 is withdrawn from the peripheries of the discs; and when the recesses 30 are out of alignment, movement of the locking member into releasing position is prevented by abutment thereof against the peripheries of the discs so as to prevent release or inward movement of the bolts I away from the lugs. By proper operation of the operating members 22 and 26 with a knowledge of the combination, the discs may be rotated to align the recesses 3l) with each other, whereupon rotation of the handle 6 in the proper direction will cause the locking member IIO to be projected into the recesses, and this greater movement of the locking member thus permitted allows the bolts I to be retracted from locking position, all as shown in Figure 3.

To prevent picking or clicking of the lock by manipulation of the discs and rotation of the handle 6, each disc has a plurality of notches 33 in its periphery at opposite sides of the recess 30. These notches will permit the locking member to enter them but they are so shallow that movement of the locking member is limited to less than the releasing movement permitted by the recesses 3D. It will be impossible for an unauthorized person to determine Whether the locking member I I0 is in a notch 33 or in a recess 30, and accordingly it is impossible to align the recesses 30 without knowledge of the combination.

It will be understood by those skilled in the art that the permutation discs will be so related that the arcuate sl-ots 28, the studs 21 and the angular relation of the operating members thereto and to the notches in the discs I3 and I2 will be such that the recesses in theY disc can be aligned by rotating the operatingmembers in certain succession in certain different directions and predetermined distances.

While I have shown and described my invention as embodied in certain specific details of construction it should be understood that thisis primarily for the purpose of illustrating the prin-f ciples of the invention and that many modica.- tions and changes may be made in the structure of the lock without departing from theA spiritor scope of the invention.

Having thus described. my invention, what I claim is: Y

1. A combination lock including two pairs: of coaxial relatively rotatable discs, each. disc having a recess to aline with the recesses of the other discs when the discs are in a predetermined relation, the discs of each pair having respectively a coaxial arcuate slot and a stud in said slot to permit movement of the discs'of the respective pairs selectively relatively andl together, a rotatable operating sleeve connected to one disc of one pair, and a rotatable operatingA pin within said sleeve connectedV to. one disc ofA the other pair, whereby said recesses in the discs can be alined by relative rotation of said sleeve and pin.

2. The combination lock set forth in claim 1 with the addition of a pair of rigidly connected spaced frame plates between which said discs are arranged, a partition plate between the two pairs of discs rigidly connected to said frame plates, and a spacer plate between the discs of each pair, said spacer plates having coaxial telescopically associated flanges extending through one of said frame plates and in which said pin and sleeve'are respectively mounted.

3. The combination lock set forth in claim 1 with the addition of a pair of rigidly connected spaced frame plates between which said discs are arranged, a partition plate between the two pairs of discs rigidly connected to said frame plates, and a spacer plate between the discs of each pair, said spacer plates having coaxial telescopically associated flanges extending through one of said frame plates and in which said pin and sleeve are respectively mounted, and a locking member slidably mounted in said frame plates and normally held in locking position by abutment with the peripheries of said discs but movable into all of said recesses simultaneously into unlocking position when-said recesses are in alinement.

4. A combination lock comprising a plurality of coaxial. rotatable permutation disks each having a recess to aline with the recess of the other disks when the disks are in a predetermined relation to each other, a. locking member normally held in locking position by abutment with said disks and movable into all of said recesses simultaneously into releasing position when said recesses are alined with each other, and two coaxial rotatable operating members each xedly connected to onedisk, each said disk that is connected to said operating members being operatively connected to another disk for movement with and relatively to the latter so that the second-mentioned disks can be rotated by rotation of the respective operating members and the corresponding rst-mentioned disks can be rotated independently of the second-mentioned disks to aline said recesses of all the disks.

PETER BOLIS. 

